...It's a very strange little puzzle/platformer, requiring you to find your way through a semi-open-ended platform environment. You can toggle between a Sackbot and your checkpoint using L1, and you may often need to respawn, even while your'e still alive. To avoid too much confusion, the 'R' stick moves the checkpoint, and you must 'lock' it each time into the unique notched pillar to respawn. Hope this helps!